O-LevelBiologyRespiration5090/11 · Oct/Nov 2024 · Q141 Mark

The table shows the changes that occur in the thorax during breathing. Which changes occur during inspiration? [Table]

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Acontracts contract relax falls and then rises

Brelaxes relax contract rises and then falls

Crelaxes contract relax rises and then falls

Dcontracts relax contract falls and then rises

✓ Correct answer

A: contracts contract relax falls and then rises

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Topic: Respiration, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2024 Paper 1 Variant 1, question 14.

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